package main

  import (
      "fmt"
      "gokafkademo/config"
      "log"
      "strings"

      "github.com/confluentinc/confluent-kafka-go/kafka"
  )

  func main() {

      cfg, err := config.ParseConfig("../config/kafka.json")
      if err != nil {
          log.Fatal(err)
      }

      p, err := kafka.NewProducer(&kafka.ConfigMap{
          // To set connection points, obtain the corresponding Topic connection points through the console.
          "bootstrap.servers": strings.Join(cfg.Servers, ","),
          // The SASL authentication mechanism is PLAIN by default.
          "sasl.mechanism": "PLAIN",
          // Configure the ACL policy locally.
          "security.protocol": "SASL_PLAINTEXT",
          // The username is the configured username, and password is the configured user password .
          "sasl.username": cfg.SASL.Username,
          "sasl.password": cfg.SASL.Password,

          // There are three ack mechanisms for a Kafka producer as described below:
          // -1 or all: The broker responds to the producer and continues to send the next message or next batch of messages only after the leader receives the data and synchronizes it to the followers in all ISRs.
          // This configuration offers the highest data reliability. There is no message loss as long as one synchronized replica is active. Note: This configuration cannot ensure that all replicas have completed read or write operations on the data before returning.
          // It can be used together with the `min.insync.replicas` parameter at the Topic level.
          // 0: The producer does not wait for the confirmation of synchronization completion from the broker and continues to send the next message (or the next batch of messages). This configuration offers the highest production performance but the lowest data reliability. (Data loss may occur in the event of server failure. If the leader is down but the producer is unaware, then the broker will not receive messages.)
          // 1: The producer sends the next message (or the next batch of messages) after the leader has successfully received the data and confirmed it. This configuration is a balance between production throughput and data reliability. (If the leader is down but not replicated, the message may be lost.)
          // When the user does not specify a configuration, the default value is 1. Users can adjust this value according to their business needs.
          "acks": 1,
          // The number of retries upon request error. It is recommended to set the value to be greater than 0. This can ensure failed requests are retried, maximizing the chances of preventing message loss.
          "retries": 0,
          // The time interval between a failed request and the next retry attempt.
          "retry.backoff.ms": 100,
          // Timeout period for network requests made by the producer.
          "socket.timeout.ms": 6000,
          // Set the internal retry interval of the client.
          "reconnect.backoff.max.ms": 3000,
      })
      if err != nil {
          log.Fatal(err)
      }

      defer p.Close()

      // Deliver the produced messages to the report processing program.
      go func() {
          for e := range p.Events() {
              switch ev := e.(type) {
              case *kafka.Message:
                  if ev.TopicPartition.Error != nil {
                      fmt.Printf("Delivery failed: %v\\n", ev.TopicPartition)
                  } else {
                      fmt.Printf("Delivered message to %v\\n", ev.TopicPartition)
                  }
              }
          }
      }()

      // Asynchronously send messages.
      topic := cfg.Topic
      for _, word := range []string{"Confluent-Kafka", "Golang Client Message"} {
          _ = p.Produce(&kafka.Message{
              TopicPartition: kafka.TopicPartition{Topic: &topic, Partition: kafka.PartitionAny},
              Value:          []byte(word),
          }, nil)
      }

      // Wait for message delivery.
      p.Flush(10 * 1000)

go run main.go

Delivered message to test[0]@628
Delivered message to test[0]@629

  package main

  import (
      "fmt"
      "gokafkademo/config"
      "log"
      "strings"

      "github.com/confluentinc/confluent-kafka-go/kafka"
  )

  func main() {

      cfg, err := config.ParseConfig("../config/kafka.json")
      if err != nil {
          log.Fatal(err)
      }

      c, err := kafka.NewConsumer(&kafka.ConfigMap{
          // To set connection points, obtain the corresponding Topic connection points through the console.
          "bootstrap.servers": strings.Join(cfg.Servers, ","),
          // The SASL authentication mechanism is PLAIN by default.
          "sasl.mechanism": "PLAIN",
          // Configure the ACL policy locally.
          "security.protocol": "SASL_PLAINTEXT",
          // The username is the configured username, and password is the configured user password .
          "sasl.username": cfg.SASL.Username,
          "sasl.password": cfg.SASL.Password,
          // The configured message consumption group.
          "group.id":          cfg.ConsumerGroupId,
          "auto.offset.reset": "earliest",

          // When you use the Kafka consumption group mechanism, set the consumer timeout period. If the broker does not receive a heartbeat from the consumer within this period, the consumer is considered as failed and Broker
          // Initiate the Rebalance process. Currently, this value needs to be configured between group.min.session.timeout.ms=6000 and group.max.session.timeout.ms=300000 in the broker configuration.
          "session.timeout.ms": 10000,
      })

      if err != nil {
          log.Fatal(err)
      }
      // The list of subscribed message topics.
      err = c.SubscribeTopics([]string{"test", "test-topic"}, nil)
      if err != nil {
          log.Fatal(err)
      }

      for {
          msg, err := c.ReadMessage(-1)
          if err == nil {
              fmt.Printf("Message on %s: %s\\n", msg.TopicPartition, string(msg.Value))
          } else {
              // The client will automatically try to recover all errors.
              fmt.Printf("Consumer error: %v (%v)\\n", err, msg)
          }
      }

      c.Close()
  }

go run main.go

Message on test[0]@628: Confluent-Kafka
Message on test[0]@629: Golang Client Message